Heating apparatus



Oct. 7 1924.

G. A. GUENTHER HEATING APPARATUS 2 Sheets-Shea r'wf/g? 2' Filed Jan. 22,

Oct. 7 1.924.

G. A. GUENTHER HEAT I NG APPARATUS 2 sheets sheet 2 i I a u ghmm A u.

Patented Oct. 7, 1924.

UNITED STATES PATENT OFFICE.

GEORGE A. GUENTHEB, OI BUFFALO, NEW YORK, ASBIGNOR OI ONE-HALF TO GEORGE DUCHSGHEBEE, OF BUFFALO, NEW YORK.-

EEL'I'ING APPARATUS.

Application filed January 22 1923. Serial No. 614,150,

To all whom it may concern:

Be it known'that I, Gnonon A. GUENTHER, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have invented new and useful Im rovements in Heating A paratus, of whlch the following is a specification.

This invention relates to a gas heating apparatus of the t pe which utilizes suction for circulating t e heated air through the radiator.

One of its objects is to produce a reliable and eflicient heating apparatus of this character which is simple and compact inconstruction and economical in operation.

A further object of the invention is to provide improved means for positively shutting off the gas supply without affecting the suction sup y of the apparatus Still furt or objects of the invention and features of construction will appear in the description and be particularly pointed out in the appended clalms.

In the accompan in drawings: Figure 1 5 is a front view of t e fieater embodying m invention. Figure 2 is a rear view thereo Figure 3 is a transverse vertical section on line 33, Fig. 1. "Fi re4 is a horizontal section on line 4-4,

enlar ed transverse vertical section on line 5-5, ig. 1. Figures 6 and 7 are enlarged vertical ongitudlnal sections on the correspondingly numbered lines in Fig. 4. Figure 8 is a transverse vertical section on line 8-8, Fig. 7. Fi re 9 is a rear view of the heater showing t e various parts of the apparatus connected therewith.

Similar characters of reference refer to like parts throu bout the several views.

In its genera organization, this heating apparatus com rises a radiator having a burner or com ustion box communicating therewith, suction means for drawing air through the radiator, an automatic valve for controlling the admission of gas to the burner and overned by the air suction through the radiator, and a supplementary or cutofi valve for controlling the admission of s to the burner and operable both manualy and automatically independently of the air suction..

10 indicates the radiator which is of the well known sectional ty e and is provided with. a burner-box or com ustion chamber 11 65 located centrally in its' upper part. The

ig. 1. Figure 5 is an upper end of the burner-box communicates Wlth the adjacent inner radiator sections which are connected at their lower ends by a horizontal pipe 12 to which is joined an exhaust condult 13 communicating with an exhaust fan 13" or other source of artificial suction.- A hinged door or lid 14 having a sight opening or window 15 is applied to the front side of said burner-box for gaining access thereto when desired.

Located within the burner-box is a suit able gas burner 16, which, as shown in Fi 3, 5 and 6, is mounted on the upper end 0 a substantially upright mixing tube 17 fastened to the bottom wall of said burner-box. Disposed in rear of said mixin tube is a valve body or casin 18 which is provided with a substantially -shaped gas passage 19 whose lower end communicates wlth a comparatively short horizontal pipe 20 which also serves as a means for connecting said valve casing with the lower end of the mixing tube, as shown in Fig. 5. The upper end of the valve casing has a valve seat 21 with which anautomatic valve 22 co-operates for shutting off or admitting as to the burner 16. It will'be noted that t e upper'tubular portion 23 of the valve casing 18 containing the valve seat is somewhat smaller in diameter than its lower portion and enclosin the same is a T-fitting or head 24 whic is screwed to said lower portion and to which is connected a gas su ply pipe 25. By this construction, an annu ar space 26 is formed between these arts with which the gas passa' e 19 and t e as supply i e 25 comm nicate. The ugper e'nd of t e T-fitting ma be closed by a screw plug 27.

he mixin tube 17, the passage 19, and

the horizonta ipe 2O constitute a substantially U-shape gas conduit, the gas belng admitted at the u per end of sai passage 19 and discharged into the burner at the outlet or u per end of the mixing tube.

In a dition tothe main burner 16, a pilot burner 28 may be employed. As shown in -Fig. 5,.it has an air pa-mge 29 leadi to the atmosphere and a gas tube 30 whic is connectedat its lower end to the T-fitting 25. This gas tube opens directly into the annular gas-receiving space 26 so that the ilot burner is constantly supplied with he gas suppl pi e 25 may be provi with a shut-o coc 31.

For the purpose of regulating the flow of 'tus is inoperative.

gas as it enters the lower end of the mixing tube 17, a regulating valve 32 is adjustably mounted therein and co-operates with a.

valve seat 33 formed in the opposing end of the horizontal pipe 20.

The automatic valve 22 which controls the flow of gas to the mixing tube 17 is held open by a diaphragm operated by the air suction when the heating apparatus is in operation and is held tightly to its seat by its own weight and by the gas pressure when the suction is turned off or when the appara- To this end, a diaphragm-body 34 is provided which is fastened by screws 35 to the bottom of the valve casing 18. Supported within this diaphragm-body which is open at. its bottom, is a comparatively large diaphragm 36 whose upper side is exposed to the action of suction. The suction chamber 37 formed between this diaphragm and the top ofthe diaphragm body is connected by a conduit 38. with the interior of the burner box 11, so

. that when the heating apparatus is in operation, the suction through the vacuum pipe 13, radiator 10, burner-box, and conduit causes said diaphragm to be lifted. Located above this main diaphragm and operable thereby is a comparatively small supplementary diaphragm 39 which carries a depending spindle 40 arranged to bear against the upper side ofsaid main'diaphragm. The stem 41 of the valve 22 in turn bears against the upper side of the supplementary diaphragm, so that when the main diaphragm is lifted by suction, the supplementary diaphragm is likewise raised, thereby lifting said valve off its seat and allowing the gas to enter the passage 19 and the mixing tube 17 to the burner. By this doubleor differential diaphragm arrangement, any difference in the gas pressure over the air or suction pressure 18 overcome and the automatic valve 22 is positively held in its open position during the operation of the apparatus. Furthermore, by controlling the valve 22 in this manner, 1t is automatically opened whenever the suction device is turned on and is likewise closed whenever said device is shut ofl'.

The upper end of the mixing tube is provided with an air-intake passage 42 for mixing the proper amount of air with'the gas before it reaches the burner. The amount of air admitted to the mixing tube through this air-intake is regulated by a suitable shutter-valve 43 mounted 'on the end of a rotatable stem 44. Arranged over this air-intake and its valve and suitably supported at the side of the mixing tube is a hood 45 which is provided in its lower portion with an opening 46 over which a screen 47 extends for removing the dust from the 1n 0mg alr.

or the purpose of shutting off the gas at emma ,ihe radiator when desired, a supplementary valve operable independently of suction and the automatic valve 22 is provided which can be controlled manually or electrically through the medium of a thermostat. This cut-off or supplementary valve, as shown in Figs. 5 and 6 and designated by the numeral 48, controls a port 49 preferably located in the lower end of the mixing-tube above the regulating valve 32. The stem 50 of said valve is pivoted at its upper end to a. pair of ears 51 formed on a horizontal rock shaft 52 mounted in the upper end of the mixing-tube. This valve closes up: wardly against its seat and unless some provision was made to guard against it, said valve would always tend by its own weight to seek its open position. In order to positively and reliably hold the valve in one position or the other, one end of its actuating shaft 52 has fixed transversely thereon a counterweight which preferably consists of a tube 53 closed at elther end and part1 filled with mercury or other heavy fluidi \Vhen this tube is tilted manually in one direction or the other, the weight of its fluid contents overbalances that of the valve and its associated parts so that said valve is' positively held in a set position. As shown in the drawings, this weighted-tube is located at the front side of the radiator where it can be conveniently shifted to one position or the other to effect an opening or closing of the valve.

In addition to operating the valve 48 manually through the medium of the. mercury tube 53 as a handle, the same may be actuated automatically in response to temperature changes in the room in which the radiator is located. The preferred means for accomplishing this result are shown in Figs. 1', 3 and 7 and consist of a solenoid magnet 54 operatively connected to the weighted tube, and a thermostat 55, both of said parts being included in a battery ircuit 56. The solenoid magnet is dispose in a horizontal position lengthwise of the radiator, and issecured by screws 57 or other fastenings to a pair of bracket arms 58 projecting forwardly from the mixing-tube 17. The movable core 59 of the solenoid is operatively connected with the tube 53 by a link 60 carried by the lower end of an arm 61 depending from the central portion of the valve is opened, thereby admitting gas to the main burner, which is ignited by the pilot burner. The final movement of the solenoid core in each direction is supplemented by the mercury tube 53.

As shown in Figs. 7 and 8, the hood is so constructed that its lower portion extends over and encloses the solenoid, leavi an air space 62 between the latter and sa id hood to permit tl .e air, entering throu h the screen 47 to Cll iulate around the so enoid before it passes throu h the intake 42 to the mixing-tube. By this construction, the solenoid is protected from the heat given oil by the radiator and the air circulating about it keeps it cool.

In utilizing a number of these radiators, such for example, as in the heating of a home, they are all connected to a common source of suction and to the gas pipe leading from the customary as meter. The air suction through each ra iator remains constant at all time regardless of whether all the radiators are on or not. While it is necessary that the suction must be on in order to operate any or all of the radiators so as to automaticallg open the gas-inlet valve 22 of each of t e latter, the sup lementary valve 48 in the mixing tube 1 is operable independently of the suction, whereby each radiator can be separately controlled without in any way affecting the suction pressure in the lineor disturbing the position or said gas-inlet valve.

I claim as my invention:

1. A apparatus, comprising a combustion chain er, a burner therefor, a suction device communicating with said combustion chamber, a valve having a stern controlling the admission of fuel to the burner and means for automatically opening said valve upon the operation of the suction device, said means comprising a diaphragm chamber in communication with the combustion chamber, and diaphragms of diderent areas located in said chamber and arranged so that the movement of one affects the movement of the other, the larger dipahragm .being exposed to the atmosphere and the valve stem engaging the smaller dia hnagm.

2. A heating apparatus, comprising a combustion chamber, a burner therefor, a suction device communicatin with the combustion chamber, a gas-conduit having its outlet end opening into said burner, an au tomatio valve located in the inlet end of said conduit and controlling the admission of fuel thereto, said valve being open when said suction deviceis operative, a supplementary valve having a stem located in said conduit beyond said automatic valve for cutting 011' at will the fuel supply to the burner, a rock shaft to which said Valve stem is connected, and a counterweighted element applied to said shaft for holding said valve in a set position.

3. A heating apparatus, comprising a combustion chamber, a burner therefor, a suction device communicating with the combustion chamber, an automatic valve for controlling the admission of fuel to the burner, means operable by the suction for opening said automatic valve, a gas cut-0d valve located between the latter and the burner, a rock shaft operatively connected to said cut-ofi' valve to actuate it, an arm applied to said rock shaft, and thermostatic mechanism including a solenoid having its core operatively connected to said arm.

4. A heating apparatus, comprising a.

combustion chamber, a burner therefor, a

suction device communicating with the combustion chamber, a gas-conduit having its outlet end opening into said burner, a valve at the inlet end of said conduit for controlling the admission of fuel thereto, said valve being open when said suction device is operative, a cut-off valve located in said conduit beyond said automatic valve, thermostatic mechanism including a solenoid operatively connected to said cut-on valve, said conduit having an air-intake arranged between the cut-off valve and the burner, and a hood enclosing said air-intake and said solenoid and having an opening therein communicating with the atmosphere.

5. A heating apparatus, comprising a combustion chamber, a burner therefor, a suction device communicating with the combustion chamber, a valve casing containing a gas-passage having a valve-seat at one an a mixing-tube for the burner communieating with the other end of said passage, a valve in said casing for controlling the fuel supply, means to efiect the seating of the valve upon the stopping of the suction device and the unseating of the valve upon the starting of the latter, a normally open cut-ofl valve arranged in said mixing-tube, the latter having an air-intake passage above said cut-ed va ve, a thermally-controlled solenoid a plied to said mixing-tube and having its Hill core operatively connected to the cut-ofi valve, and a. hood open at its bottom arran to extend over the solenoid and the air-intake passage.

GEORGE A. GUENTHER. 

